I think they're understanding the complexity of the Japanese number system by quite a lot: https://en.wikipedia.org/wiki/Japanese_counter_word
Classifiers are mostly orthogonal to the number system, and they're really no different from e.g. English using "a herd of cattle" or "a murder of crows" to redundantly encode the kind of thing being talked about. I'm actually not aware of any language that doesn't have different units of measurement for different objects, it's just that some languages effectively make it mandatory to use them. (E.g. in Chinese you c…
https://www.quora.com/Why-is-a-group-of-crows-called-a-murde...
I have never heard or read the words "a murder of crows" (or "a parliament of owls" and similar contrivances) except in lists of collective nouns.